Alert archive / Arizona / Flash Flood Watches in 2021
Flash Flood Watch 10, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood watch at Aug 30, 2021, 3:28 AM MST for Mohave County, Arizona; San Bernardino County, California; Clark County, Nevada. It took effect at Aug 31, 2021, 11:00 AM MST. It was in force for 27 hr.
The area
The counties it named.
The facts
- Issued
- Aug 30, 2021, 3:28 AM MST (10:28 UTC)
- In effect from
- Aug 31, 2021, 11:00 AM MST
- Expired
- Sep 1, 2021, 2:11 PM MST
- In force
- 27 hr
- Issued by
- NWS Las Vegas, NV
- Flood severity
- None
Counties Mohave County, AZ, San Bernardino County, CA, Clark County, NV
The radar
The Las Vegas radar (KESX), 15 km from the middle of the area, began a volume at 10:31 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Las Vegas, NV (KVEF), launched 00:00Z, 10.5 hours before the alert went out and 101 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 421 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 3881 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -15 m²/s²
- 0-3 km storm-relative helicity
- 71 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
661 WGUS65 KVEF 301028 FFAVEF URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Las Vegas NV 328 AM PDT Mon Aug 30 2021 CAZ525-526-301830- /O.NEW.KVEF.FF.A.0010.210831T1800Z-210901T0900Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Morongo Basin-Cadiz Basin- 328 AM PDT Mon Aug 30 2021 ...FLASH FLOOD WATCH IN EFFECT FROM TUESDAY MORNING THROUGH LATE TUESDAY NIGHT... The National Weather Service in Las Vegas has issued a * Flash Flood Watch for a portion of southeast California, including the following areas, Cadiz Basin and Morongo Basin. * From Tuesday morning through late Tuesday night * An upper level disturbance coupled with remnant tropical moisture from Nora will create conditions favorable for efficient rain producing thunderstorms. Storms that develop in this environment will be capable of producing very heavy rain in a short period of time which could result in life threatening flash flooding. * Areas of concern include Highway 62 east of Yucca Valley to Vidal Junction across the southern portion of San Bernardino County. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may become favorable for flooding of washes...streams and other drainage areas in the watch area. If you are in the watch area...you should closely monitor weather forecasts and be prepared to take immediate action should heavy rain and flooding occur or a flash flood warning is issued. Listen to NOAA weather radio...commercial radio or television stations for updates on this flash flood threat or by visiting us online at weather.gov/lasvegas && $$ AZZ002-003-036-CAZ527-NVZ021-301830- /O.NEW.KVEF.FF.A.0010.210831T1800Z-210902T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lake Havasu and Fort Mohave-Northwest Deserts- Lake Mead National Recreation Area-San Bernardino County- Upper Colorado River Valley- 328 AM PDT Mon Aug 30 2021 /328 AM MST Mon Aug 30 2021/ ...FLASH FLOOD WATCH IN EFFECT FROM TUESDAY MORNING THROUGH LATE WEDNESDAY NIGHT... The National Weather Service in Las Vegas has issued a * Flash Flood Watch for portions of northwest Arizona, southeast California, and southern Nevada, including the following areas, in northwest Arizona, Lake Havasu and Fort Mohave, Lake Mead National Recreation Area, and Northwest Deserts. In southeast California, San Bernardino County-Upper Colorado River Valley. In southern Nevada, Lake Mead National Recreation Area. * From Tuesday morning through late Wednesday night * An upper level disturbance coupled with remnant tropical moisture from Nora will create conditions favorable for numerous to widespread efficient rain producing thunderstorms. Storms that develop in this environment will be capable of producing very heavy rain in a short period of time which could result in life threatening flash flooding. * Areas of concern include Highway 95 south of Needles, the communities of Lake Havasu City, Needles, Laughlin, and Bullhead City within the Colorado River Valley, communities and roads vunerable to flash flooding throughout central and southern Mohave County, and the Flag Fire burn scar. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may become favorable for flooding of washes...streams and other drainage areas in the watch area. If you are in the watch area...you should closely monitor weather forecasts and be prepared to take immediate action should heavy rain and flooding occur or a flash flood warning is issued. Listen to NOAA weather radio...commercial radio or television stations for updates on this flash flood threat or by visiting us online at weather.gov/lasvegas && $$ AZZ001-301830- /O.NEW.KVEF.FF.A.0010.210901T1500Z-210902T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northwest Plateau- 328 AM MST Mon Aug 30 2021 ...FLASH FLOOD WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH LATE WEDNESDAY NIGHT... The National Weather Service in Las Vegas has issued a * Flash Flood Watch for a portion of northwest Arizona, including the following area, Northwest Plateau. * From Wednesday morning through late Wednesday night * An upper level disturbance coupled with remnant tropical moisture from Nora will create conditions favorable for efficient rain producing thunderstorms. Storms that develop in this environment will be capable of producing very heavy rain in a short period of time which could result in life threatening flash flooding. * Areas of concern for flooding include rural roads around the Mt. Trumbell loop, Highway 389, the community of Colorado City within the Short Creek Basin, and Pipe Spring National Monument. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may become favorable for flooding of washes...streams and other drainage areas in the watch area. If you are in the watch area...you should closely monitor weather forecasts and be prepared to take immediate action should heavy rain and flooding occur or a flash flood warning is issued. Listen to NOAA weather radio...commercial radio or television stations for updates on this flash flood threat or by visiting us online at weather.gov/lasvegas && $$
6 follow-up statements
502 WGUS65 KVEF 301814 FFAVEF Flood Watch National Weather Service Las Vegas NV 1114 AM PDT Mon Aug 30 2021 CAZ525-526-310600- /O.CON.KVEF.FF.A.0010.210831T1800Z-210901T0900Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Morongo Basin-Cadiz Basin- 1114 AM PDT Mon Aug 30 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM TUESDAY MORNING THROUGH LATE TUESDAY NIGHT... The Flash Flood Watch continues for * A portion of southeast California, including the following areas, Cadiz Basin and Morongo Basin. * From Tuesday morning through late Tuesday night * An upper level disturbance coupled with remnant tropical moisture from Nora will create conditions favorable for efficient rain producing thunderstorms. Storms that develop in this environment will be capable of producing very heavy rain in a short period of time which could result in life threatening flash flooding. * Areas of concern include Highway 62 east of Yucca Valley to Vidal Junction across the southern portion of San Bernardino County. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may become favorable for flooding of washes...streams and other drainage areas in the watch area. If you are in the watch area...you should closely monitor weather forecasts and be prepared to take immediate action should heavy rain and flooding occur or a flash flood warning is issued. Listen to NOAA weather radio...commercial radio or television stations for updates on this flash flood threat or by visiting us online at weather.gov/lasvegas && $$ AZZ002-003-036-CAZ527-NVZ021-310600- /O.CON.KVEF.FF.A.0010.210831T1800Z-210902T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lake Havasu and Fort Mohave-Northwest Deserts- Lake Mead National Recreation Area-San Bernardino County- Upper Colorado River Valley- 1114 AM PDT Mon Aug 30 2021 /1114 AM MST Mon Aug 30 2021/ ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM TUESDAY MORNING THROUGH LATE WEDNESDAY NIGHT... The Flash Flood Watch continues for * Portions of northwest Arizona, southeast California, and southern Nevada, including the following areas, in northwest Arizona, Lake Havasu and Fort Mohave, Lake Mead National Recreation Area, and Northwest Deserts. In southeast California, San Bernardino County-Upper Colorado River Valley. In southern Nevada, Lake Mead National Recreation Area. * From Tuesday morning through late Wednesday night * An upper level disturbance coupled with remnant tropical moisture from Nora will create conditions favorable for numerous to widespread efficient rain producing thunderstorms. Storms that develop in this environment will be capable of producing very heavy rain in a short period of time which could result in life threatening flash flooding. * Areas of concern include Highway 95 south of Needles, the communities of Lake Havasu City, Needles, Laughlin, and Bullhead City within the Colorado River Valley, communities and roads vulnerable to flash flooding throughout central and southern Mohave County, and the Flag Fire burn scar. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may become favorable for flooding of washes...streams and other drainage areas in the watch area. If you are in the watch area...you should closely monitor weather forecasts and be prepared to take immediate action should heavy rain and flooding occur or a flash flood warning is issued. Listen to NOAA weather radio...commercial radio or television stations for updates on this flash flood threat or by visiting us online at weather.gov/lasvegas && $$ AZZ001-310600- /O.CON.KVEF.FF.A.0010.210901T1500Z-210902T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northwest Plateau- 1114 AM MST Mon Aug 30 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING THROUGH LATE WEDNESDAY NIGHT... The Flash Flood Watch continues for * A portion of northwest Arizona, including the following area, Northwest Plateau. * From Wednesday morning through late Wednesday night * An upper level disturbance coupled with remnant tropical moisture from Nora will create conditions favorable for efficient rain producing thunderstorms. Storms that develop in this environment will be capable of producing very heavy rain in a short period of time which could result in life threatening flash flooding. * Areas of concern for flooding include rural roads around the Mt. Trumbull loop, Highway 389, the community of Colorado City within the Short Creek Basin, and Pipe Spring National Monument. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may become favorable for flooding of washes...streams and other drainage areas in the watch area. If you are in the watch area...you should closely monitor weather forecasts and be prepared to take immediate action should heavy rain and flooding occur or a flash flood warning is issued. Listen to NOAA weather radio...commercial radio or television stations for updates on this flash flood threat or by visiting us online at weather.gov/lasvegas && $$ Morgan
921 WGUS65 KVEF 310545 FFAVEF Flood Watch National Weather Service Las Vegas NV 1045 PM PDT Mon Aug 30 2021 CAZ525-526-312200- /O.CON.KVEF.FF.A.0010.210831T1800Z-210901T0900Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Morongo Basin-Cadiz Basin- Including the cities of Vidal Junction, Twentynine Palms, Yucca Valley, and Morongo Valley 1045 PM PDT Mon Aug 30 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM TUESDAY MORNING THROUGH LATE TUESDAY NIGHT... The Flash Flood Watch continues for * A portion of southeast California, including the following areas, Cadiz Basin and Morongo Basin. * From Tuesday morning through late Tuesday night. * An upper level disturbance coupled with remnant tropical moisture from Nora will create conditions favorable for efficient rain producing thunderstorms. Storms that develop in this environment will be capable of producing very heavy rain in a short period of time which could result in life threatening flash flooding. * Areas of concern include Highway 62 east of Yucca Valley to Vidal Junction across the southern portion of San Bernardino County. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && $$ AZZ002-003-036-CAZ527-NVZ021-312200- /O.CON.KVEF.FF.A.0010.210831T1800Z-210902T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lake Havasu and Fort Mohave-Northwest Deserts-Lake Mead National Recreation Area-San Bernardino County-Upper Colorado River Valley- Lake Mead National Recreation Area- Including the cities of Laughlin, Golden Valley, Lake Havasu City, Yucca, Oatman, Bullhead City, Valentine, Topock, Needles, Mohave Valley, Hoover Dam, Desert Hills, Kingman, Wikieup, and Dolan Springs 1045 PM MST Mon Aug 30 2021 /1045 PM PDT Mon Aug 30 2021/ ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM TUESDAY MORNING THROUGH LATE WEDNESDAY NIGHT... The Flash Flood Watch continues for * Portions of northwest Arizona, southeast California and southern Nevada, including the following areas, in northwest Arizona, Lake Havasu and Fort Mohave, Lake Mead National Recreation Area and Northwest Deserts. In southeast California, San Bernardino County-Upper Colorado River Valley. In southern Nevada, Lake Mead National Recreation Area. * From Tuesday morning through late Wednesday night. * An upper level disturbance coupled with remnant tropical moisture from Nora will create conditions favorable for efficient rain producing thunderstorms. Storms that develop in this environment will be capable of producing very heavy rain in a short period of time which could result in life threatening flash flooding. * Areas of concern include Highway 95 south of Needles, the communities of Lake Havasu City, Needles, Laughlin, and Bullhead City within the Colorado River Valley, communities and roads vulnerable to flash flooding throughout central and southern Mohave County, and the Flag Fire burn scar. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. A Flash Flood Watch means that conditions may become favorable for flooding of Wheeler Wash and areas adjacent to the Flag Burn Area. In steep terrain, the rainfall could trigger debris flows and rockfalls. Be prepared to take immediate action should rainfall trigger flash flooding. && $$ AZZ001-312200- /O.CON.KVEF.FF.A.0010.210901T1500Z-210902T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northwest Plateau- Including the cities of Western Grand Canyon, Mt Trumbull, Colorado City, Tuweep, and Pipe Spring National Monument 1045 PM MST Mon Aug 30 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING THROUGH LATE WEDNESDAY NIGHT... The Flash Flood Watch continues for * A portion of northwest Arizona, including the following area, Northwest Plateau. * From Wednesday morning through late Wednesday night. * An upper level disturbance coupled with remnant tropical moisture from Nora will create conditions favorable for efficient rain producing thunderstorms. Storms that develop in this environment will be capable of producing very heavy rain in a short period of time which could result in life threatening flash flooding. * Areas of concern for flooding include rural roads around the Mt. Trumbull loop, Highway 389, the community of Colorado City within the Short Creek Basin, and Pipe Spring National Monument. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && $$ BKP
610 WGUS65 KVEF 310950 FFAVEF URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Las Vegas NV 250 AM PDT Tue Aug 31 2021 CAZ524-311800- /O.EXA.KVEF.FF.A.0010.210831T1800Z-210901T0900Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Eastern Mojave Desert- Including the cities of Mountain Pass, Baker, and Mitchell Caverns 250 AM PDT Tue Aug 31 2021 ...FLASH FLOOD WATCH IN EFFECT FROM 11 AM PDT THIS MORNING THROUGH LATE TONIGHT... The National Weather Service in Las Vegas has expanded the * Flash Flood Watch to include a portion of southeast California, including the following area, Eastern Mojave Desert. * From 11 AM PDT this morning through late tonight. * An upper level disturbance coupled with remnant tropical moisture from Nora will create conditions favorable for efficient rain producing thunderstorms. Storms that develop in this environment will be capable of producing very heavy rain in a short period of time which could result in life threatening flash flooding. * Areas of concern include all roadways within the Mojave National Preserve and National Trails Highway. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && $$ NVZ022-311800- /O.EXA.KVEF.FF.A.0010.210831T1800Z-210902T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Southern Clark County- Including the cities of Primm, Cal-Nev-Ari, and Searchlight 250 AM PDT Tue Aug 31 2021 ...FLASH FLOOD WATCH IN EFFECT FROM 11 AM PDT THIS MORNING THROUGH LATE WEDNESDAY NIGHT... The National Weather Service in Las Vegas has expanded the * Flash Flood Watch to include a portion of southern Nevada, including the following area, Southern Clark County. * From 11 AM PDT this morning through late Wednesday night. * An upper level disturbance coupled with remnant tropical moisture from Nora will create conditions favorable for efficient rain producing thunderstorms. Storms that develop in this environment will be capable of producing very heavy rain in a short period of time which could result in life threatening flash flooding. * Areas of concern include Highway 164 and all secondary roads within southern Clark County. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && $$ AZZ001-311800- /O.EXT.KVEF.FF.A.0010.210831T1800Z-210902T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northwest Plateau- Including the cities of Western Grand Canyon, Mt Trumbull, Colorado City, Tuweep, and Pipe Spring National Monument 250 AM MST Tue Aug 31 2021 ...FLASH FLOOD WATCH NOW IN EFFECT FROM 11 AM MST THIS MORNING THROUGH LATE WEDNESDAY NIGHT... The Flash Flood Watch is now in effect for * A portion of northwest Arizona, including the following area, Northwest Plateau. * From 11 AM MST this morning through late Wednesday night. * An upper level disturbance coupled with remnant tropical moisture from Nora will create conditions favorable for efficient rain producing thunderstorms. Storms that develop in this environment will be capable of producing very heavy rain in a short period of time which could result in life threatening flash flooding. * Areas of concern for flooding include rural roads around the Mt. Trumbull loop, Highway 389, the community of Colorado City within the Short Creek Basin, and Pipe Spring National Monument. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && $$ CAZ525-526-311800- /O.CON.KVEF.FF.A.0010.210831T1800Z-210901T0900Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Morongo Basin-Cadiz Basin- Including the cities of Vidal Junction, Twentynine Palms, Yucca Valley, and Morongo Valley 250 AM PDT Tue Aug 31 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 11 AM PDT THIS MORNING THROUGH LATE TONIGHT... The Flash Flood Watch continues for * A portion of southeast California, including the following areas, Cadiz Basin and Morongo Basin. * From 11 AM PDT this morning through late tonight. * An upper level disturbance coupled with remnant tropical moisture from Nora will create conditions favorable for efficient rain producing thunderstorms. Storms that develop in this environment will be capable of producing very heavy rain in a short period of time which could result in life threatening flash flooding. * Areas of concern include Highway 62 east of Yucca Valley to Vidal Junction across the southern portion of San Bernardino County. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && $$ AZZ002-003-036-CAZ527-NVZ021-311800- /O.CON.KVEF.FF.A.0010.210831T1800Z-210902T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lake Havasu and Fort Mohave-Northwest Deserts-Lake Mead National Recreation Area-San Bernardino County-Upper Colorado River Valley- Lake Mead National Recreation Area- Including the cities of Laughlin, Golden Valley, Lake Havasu City, Yucca, Oatman, Bullhead City, Valentine, Topock, Needles, Mohave Valley, Hoover Dam, Desert Hills, Kingman, Wikieup, and Dolan Springs 250 AM MST Tue Aug 31 2021 /250 AM PDT Tue Aug 31 2021/ ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 11 AM MST /11 AM PDT/ THIS MORNING THROUGH LATE WEDNESDAY NIGHT... The Flash Flood Watch continues for * Portions of northwest Arizona, southeast California and southern Nevada, including the following areas, in northwest Arizona, Lake Havasu and Fort Mohave, Lake Mead National Recreation Area and Northwest Deserts. In southeast California, San Bernardino County-Upper Colorado River Valley. In southern Nevada, Lake Mead National Recreation Area. * From 11 AM MST /11 AM PDT/ this morning through late Wednesday night. * An upper level disturbance coupled with remnant tropical moisture from Nora will create conditions favorable for efficient rain producing thunderstorms. Storms that develop in this environment will be capable of producing very heavy rain in a short period of time which could result in life threatening flash flooding. * Areas of concern include Highway 95 south of Needles, the communities of Lake Havasu City, Needles, Laughlin, and Bullhead City within the Colorado River Valley, communities and roads vulnerable to flash flooding throughout central and southern Mohave County, and the Flag Fire burn scar. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. A Flash Flood Watch means that conditions may become favorable for flooding of Wheeler Wash and areas adjacent to the Flag Burn Area. In steep terrain, the rainfall could trigger debris flows and rockfalls. Be prepared to take immediate action should rainfall trigger flash flooding. && $$ BKP
556 WGUS65 KVEF 311733 FFAVEF Flood Watch National Weather Service Las Vegas NV 1033 AM PDT Tue Aug 31 2021 NVZ022-010900- /O.CON.KVEF.FF.A.0010.210831T1800Z-210902T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Southern Clark County- 1033 AM PDT Tue Aug 31 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE WEDNESDAY NIGHT... The Flash Flood Watch continues for * A portion of southern Nevada, including the following area, Southern Clark County. * Through late Wednesday night * An upper level disturbance coupled with remnant tropical moisture from Nora will create conditions favorable for efficient rain producing thunderstorms. Storms that develop in this environment will be capable of producing very heavy rain in a short period of time which could result in life threatening flash flooding. * Areas of concern include Highway 164 and all secondary roads within southern Clark County. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && $$ CAZ524>526-010900- /O.CON.KVEF.FF.A.0010.210831T1800Z-210901T0900Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Eastern Mojave Desert-Morongo Basin-Cadiz Basin- 1033 AM PDT Tue Aug 31 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... The Flash Flood Watch continues for * A portion of southeast California, including the following areas, Cadiz Basin, Eastern Mojave Desert, and Morongo Basin. * Through late tonight * An upper level disturbance coupled with remnant tropical moisture from Nora will create conditions favorable for efficient rain producing thunderstorms. Storms that develop in this environment will be capable of producing very heavy rain in a short period of time which could result in life threatening flash flooding. * Areas of concern include Highway 62 east of Yucca Valley to Vidal Junction across the southern portion of San Bernardino County, and roads in the Mojave National Preserve. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && $$ AZZ001>003-036-CAZ527-NVZ021-010900- /O.CON.KVEF.FF.A.0010.210831T1800Z-210902T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northwest Plateau-Lake Havasu and Fort Mohave-Northwest Deserts- Lake Mead National Recreation Area-San Bernardino County- Upper Colorado River Valley- 1033 AM PDT Tue Aug 31 2021 /1033 AM MST Tue Aug 31 2021/ ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE WEDNESDAY NIGHT... The Flash Flood Watch continues for * Portions of northwest Arizona, southeast California, and southern Nevada, including the following areas, in northwest Arizona, Lake Havasu and Fort Mohave, Lake Mead National Recreation Area, Northwest Deserts, and Northwest Plateau. In southeast California, San Bernardino County-Upper Colorado River Valley. In southern Nevada, Lake Mead National Recreation Area. * Through late Wednesday night * An upper level disturbance coupled with remnant tropical moisture from Nora will create conditions favorable for efficient rain producing thunderstorms. Storms that develop in this environment will be capable of producing very heavy rain in a short period of time which could result in life threatening flash flooding. * Areas of concern include Highway 95 south of Needles, the communities of Lake Havasu City, Needles, Laughlin, and Bullhead City within the Colorado River Valley, communities and roads vulnerable to flash flooding throughout central and southern Mohave County, and the Flag Fire burn scar. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. A Flash Flood Watch means that conditions may become favorable for flooding of Wheeler Wash and areas adjacent to the Flag Burn Area. In steep terrain, the rainfall could trigger debris flows and rockfalls. Be prepared to take immediate action should rainfall trigger flash flooding. && $$ Morgan
171 WGUS65 KVEF 010859 FFAVEF Flood Watch National Weather Service Las Vegas NV 159 AM PDT Wed Sep 1 2021 NVZ022-011000- /O.CAN.KVEF.FF.A.0010.000000T0000Z-210902T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Southern Clark County- Including the cities of Primm, Cal-Nev-Ari, and Searchlight 159 AM PDT Wed Sep 1 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for a portion of southern Nevada, including the following area, Southern Clark County has been cancelled. The Flash Flood Watch is cancelled. Flooding is no longer expected to pose a threat. $$ CAZ524>526-011000- /O.EXP.KVEF.FF.A.0010.000000T0000Z-210901T0900Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Eastern Mojave Desert-Morongo Basin-Cadiz Basin- Including the cities of Mountain Pass, Twentynine Palms, Mitchell Caverns, Baker, Morongo Valley, Yucca Valley, and Vidal Junction 159 AM PDT Wed Sep 1 2021 ...FLASH FLOOD WATCH WILL EXPIRE AT 2 AM PDT EARLY THIS MORNING... The Flash Flood Watch for a portion of southeast California, including the following areas, Cadiz Basin, Eastern Mojave Desert and Morongo Basin will expire at 2 AM PDT early this morning. Flooding is no longer expected to pose a threat. $$ AZZ002-003-036-CAZ527-NVZ021-012200- /O.CON.KVEF.FF.A.0010.000000T0000Z-210902T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lake Havasu and Fort Mohave-Northwest Deserts-Lake Mead National Recreation Area-San Bernardino County-Upper Colorado River Valley- Lake Mead National Recreation Area- Including the cities of Laughlin, Golden Valley, Lake Havasu City, Yucca, Oatman, Bullhead City, Valentine, Topock, Needles, Mohave Valley, Hoover Dam, Desert Hills, Kingman, Wikieup, and Dolan Springs 159 AM MST Wed Sep 1 2021 /159 AM PDT Wed Sep 1 2021/ ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... The Flash Flood Watch continues for * Portions of northwest Arizona, southeast California and southern Nevada, including the following areas, in northwest Arizona, Lake Havasu and Fort Mohave, Lake Mead National Recreation Area and Northwest Deserts. In southeast California, San Bernardino County-Upper Colorado River Valley. In southern Nevada, Lake Mead National Recreation Area. * Through late tonight. * An upper level disturbance coupled with remnant tropical moisture from Nora will create conditions favorable for efficient rain producing thunderstorms. Storms that develop in this environment will be capable of producing very heavy rain in a short period of time which could result in life threatening flash flooding. * Areas of concern include Highway 95 south of Needles, the communities of Lake Havasu City, Needles, Laughlin, and Bullhead City within the Colorado River Valley, communities and roads vulnerable to flash flooding throughout central and southern Mohave County, and the Flag Fire burn scar. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. A Flash Flood Watch means that conditions may become favorable for flooding of Wheeler Wash and areas adjacent to the Flag Burn Area. In steep terrain, the rainfall could trigger debris flows and rockfalls. Be prepared to take immediate action should rainfall trigger flash flooding. && $$ AZZ001-012200- /O.CON.KVEF.FF.A.0010.000000T0000Z-210902T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northwest Plateau- Including the cities of Western Grand Canyon, Mt Trumbull, Colorado City, Tuweep, and Pipe Spring National Monument 159 AM MST Wed Sep 1 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... The Flash Flood Watch continues for * A portion of northwest Arizona, including the following area, Northwest Plateau. * Through late tonight. * An upper level disturbance coupled with remnant tropical moisture from Nora will create conditions favorable for efficient rain producing thunderstorms. Storms that develop in this environment will be capable of producing very heavy rain in a short period of time which could result in life threatening flash flooding. * Areas of concern for flooding include rural roads around the Mt. Trumbull loop, Highway 389, the community of Colorado City within the Short Creek Basin, and Pipe Spring National Monument. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && $$ BKP
719 WGUS65 KVEF 012111 FFAVEF Flood Watch National Weather Service Las Vegas NV 211 PM PDT Wed Sep 1 2021 AZZ001>003-036-CAZ527-NVZ021-012215- /O.CAN.KVEF.FF.A.0010.000000T0000Z-210902T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northwest Plateau-Lake Havasu and Fort Mohave-Northwest Deserts- Lake Mead National Recreation Area-San Bernardino County- Upper Colorado River Valley- 211 PM PDT Wed Sep 1 2021 /211 PM MST Wed Sep 1 2021/ ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of northwest Arizona, southeast California, and southern Nevada has been cancelled. The threat for widespread heavy rain has moved away to the east, and only spotty showers and thunderstorms are expected over eastern Mohave County for the rest of the afternoon. $$ Morgan
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 5:42 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 48 min |
| Aug 30, 4:30 PM MST | Flash Flood Warning | VEF | Mohave | 100 min |
| Aug 30, 4:35 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Aug 29, 6:53 PM MST | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 30, 1:17 PM MST | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 30, 2:37 PM MST | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 30, 2:55 PM MST | Flash Flood Warning | VEF | San Bernardino | 3 hr |
Nearby
Flash Flood Watches in Arizona, 2021Flash Flood Watches in California, 2021Flash Flood Watches in Nevada, 2021Every flash flood watch in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.